A Geneticist Is Mapping the Chromosomes of the Newly Captured

question 26

Multiple Choice

A geneticist is mapping the chromosomes of the newly captured gremlin. Stripe is heterozygous for linked genes with alleles Ee, Hh, and Bb, that determine if gremlins are evil (E) , have hair (H) , and b teeth (B) . In order to determine if the three genes are linked, a standard testcross was done, and the offspring had the following genotypes: $$\begin{array} { l l } 48 & \text { ee Hh bb } \\36 & \text { ee hh Bb } \\400 & \text { ee Hh Bb } \\4 & \text { Ee Hh Bb } \\426 & \text { Eehh bb } \\46 & \text { Eehh Bb } \\38 & \text { Ee Hh bb } \\2 & \text { ee hh bb }\end{array}$$ What is the recombination frequency between genes E and H?

• A) 40%
• B) 8%
• C) 92%
• D) 8.4%
• E) 7.4%

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